mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
ec9d78070d
Commit39d114ddc6("arm64: add KASAN support") added .weak directives to arch/arm64/lib/mem*.S instead of changing the existing SYM_FUNC_START_PI macros. This can lead to the assembly snippet `.weak memcpy ... .globl memcpy` which will produce a STB_WEAK memcpy with GNU as but STB_GLOBAL memcpy with LLVM's integrated assembler before LLVM 12. LLVM 12 (since https://reviews.llvm.org/D90108) will error on such an overridden symbol binding. Use the appropriate SYM_FUNC_START_WEAK_PI instead. Fixes:39d114ddc6("arm64: add KASAN support") Reported-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Fangrui Song <maskray@google.com> Tested-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20201029181951.1866093-1-maskray@google.com Signed-off-by: Will Deacon <will@kernel.org>
67 lines
1.2 KiB
ArmAsm
67 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2013 ARM Ltd.
|
|
* Copyright (C) 2013 Linaro.
|
|
*
|
|
* This code is based on glibc cortex strings work originally authored by Linaro
|
|
* be found @
|
|
*
|
|
* http://bazaar.launchpad.net/~linaro-toolchain-dev/cortex-strings/trunk/
|
|
* files/head:/src/aarch64/
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
#include <asm/cache.h>
|
|
|
|
/*
|
|
* Copy a buffer from src to dest (alignment handled by the hardware)
|
|
*
|
|
* Parameters:
|
|
* x0 - dest
|
|
* x1 - src
|
|
* x2 - n
|
|
* Returns:
|
|
* x0 - dest
|
|
*/
|
|
.macro ldrb1 reg, ptr, val
|
|
ldrb \reg, [\ptr], \val
|
|
.endm
|
|
|
|
.macro strb1 reg, ptr, val
|
|
strb \reg, [\ptr], \val
|
|
.endm
|
|
|
|
.macro ldrh1 reg, ptr, val
|
|
ldrh \reg, [\ptr], \val
|
|
.endm
|
|
|
|
.macro strh1 reg, ptr, val
|
|
strh \reg, [\ptr], \val
|
|
.endm
|
|
|
|
.macro ldr1 reg, ptr, val
|
|
ldr \reg, [\ptr], \val
|
|
.endm
|
|
|
|
.macro str1 reg, ptr, val
|
|
str \reg, [\ptr], \val
|
|
.endm
|
|
|
|
.macro ldp1 reg1, reg2, ptr, val
|
|
ldp \reg1, \reg2, [\ptr], \val
|
|
.endm
|
|
|
|
.macro stp1 reg1, reg2, ptr, val
|
|
stp \reg1, \reg2, [\ptr], \val
|
|
.endm
|
|
|
|
SYM_FUNC_START_ALIAS(__memcpy)
|
|
SYM_FUNC_START_WEAK_PI(memcpy)
|
|
#include "copy_template.S"
|
|
ret
|
|
SYM_FUNC_END_PI(memcpy)
|
|
EXPORT_SYMBOL(memcpy)
|
|
SYM_FUNC_END_ALIAS(__memcpy)
|
|
EXPORT_SYMBOL(__memcpy)
|